Electric insulator.



C. BUSCHEUI, ELECTRIC HJSULATOR. APPLICATlON HLED APR-.10, 1915.

laiented Nov, E28, 1916.

perdafi w s M Attorney.

C; B'USCHETTI. ELECTRIC INSULATOR. APPLIGATION FILED APR-10.1915. 1305,97 1. Patented N0v.'28, 1916.

2 SHEETS-SHEET 2.

Attorney UNITED srArns ra rnnr OFFICE.

OLAUDIO BUSCHETTI, OF MILAN, ITALY.

ELECTRIC INSULATOR.

Application filed April 10, 1915.

To all whom it may concern:

Be it known that I, CLAUDIo Buscrrn'r'rr, a' subject of the King ofItaly, residing at 115 S. Cristoforo, Milan, in the Kingdom of Italy,have invented certain new and useful Improvements in ElectricInsulators, of

which the following is a specification.

In order to connect lnsulators with their supporting rods, metallicmembers such as screw-threaded sleeves, caps or pins were hitherto usedand secured to the insulator by screwing or more often by cement, orputty. In any case these members were manufactured independently andseparately they are liabl to be broken up, by shocks and the constantoscillation of the electric 'sulating lines, and secondly theycompletely and rigidly fill the cavity of the insulator within which themetallic portion is fixed so that when the temperature of the insulatorbecomes higher than it was at the time the ocmenting tool: place it isliable to be fractured owing to the pressure exerted from within by .thecement due to the expansion of the heated metal. This is caused by thedifierence in the thermal co-efiicients of expansion of these twomaterials and the inmaterial. In addition thereto, chemical reactionstake place between the putty'or cement or metal thereby producing anincrease in the volume and thus cause the bursting of the insulatorwithout the assistance of heat. The present invention eliminates thesedrawbacks as the metal which is to constitute the connecting member ofthe insulator, is fixed directly on the surface which. is to receive thesame, without the use of cement, putty or any mechanical elements butmerely by means of a gavanoplastic process. It is obvious that thegalvanic deposit may connect the insulator with other metallic partswhich have not been obtained electrolytically.

In the accompanying drawingsr Figure 1 illustrates, in section andelevation, one

Specification of Letters Patent.

Patented Nov. 28, 1916.

Serial No. 20,563.

form of the connection effected in' accordance with the invention. Fig.2 illustrates a modification in section.

a is the metallic sleeve formed with a screw-thread, which has beenprovided in the insulator (Z directly by electrolytic means; into thissleeve the pin or support of the in sulator may be introduced byscrewing, irrespective of the fact whether the screwthread has beenobtained during the electrogalvanic deposition or whether it has beenformed subsequently. The screwed connection may be replaced by any otherconnection, for example mechanical, electrical, or by solder. F orinstance, Fig. 2 illustrates another form which may be given to theelectro-galvanic connection. (Z is the insulator and b is a metallicsleeve formed with a screw-thread screwed on to the galvanic deposit awhich is partly or wholly covered thereby. The said sleeve may beconnected with any pin or support having an internal or externalscrew-thread, or by any other mechanical means. The method abovedescribed may also be used for connecting insulators with one another.

What I claim and desire to secure by Letters Patent of the United Statesis 1. In combination, an electric insulator body, a recessed portionthereon, a. metallic 'freely within said recessed portion, means uponthe projecting portion for attaching another sleeve thereto and a sleevethereon adapted to be secured to a supporting member, substantially asset forth.

2. In combination, an electric insulator body, a recessed portionthereon, a metallic sleeve electrolytically deposited upon the innerportion of the recess and projecting freely within said recessedportion, a thread upon the projecting portion and a sleeve thereonadapted to be secured to a supporting member, substantially as setforth.

In testimony whereof I afiix my signature in presence of two witnesses.

CLAUDIO BUSCHETTI.

Witnesses AUGUSTA RronANY, LYLE RoBB.

